Gate-valve.



T. WHITE. GATE VALVE. APPLIOATION FILED AUG. 16,}912.

1,084,588. Patented Jan. 13-, 1914.

v 2 SHEETS-SHEET 1.

xxtlfwyv A Witnesses I Attorneys COL CO WASH NGTON D C T. WHITE.

GATE VALVE. 7 111 2140111101: FILED AUG. 16, 1912.

2 SHEETS-SHEET 2.

IIIIIHHH!!! J6 I Inventor. by k Attorneys A ILANDGRAPH C0 ASHIN PatehtedJan. 13,1914.

UNITED STATES. PATENT OFFICE.

TILMAN WHITE, OF BERKELEY, CALIFORNIA.

GATE-VALVE.

Specification of Letters Patent.

Patented Jan. 13, 1914.

Application filed August is, 1912. Serial No. 715,467.

to provide a construction of this character including a plurality ofclosures which are: arranged to be consonantly actuated to open thevalve.

A further object of the invention is to provide a mechanism in which theclosures co-act, to contact with the valve seat.

A still further object of the invention is to provide a construction inwhich the closures which are in the nature of binge leaves travel as onemember during the greater portion of their movement, there being abypass provided in each of the leaves, said by-passes registering whilethe leaves are traveling as one member.

A still further object of the invention is to provide means formaintaining one of the closures in locked relation with respect to thecasing ,to close the valve, the other of the closures being providedwith means which when the same is actuated, will release the lockingmeans and allow both of the members to open.

A still further object of the invention is to provide a construction inwhich one leaf will be raised slightly in advance of the other, theleaves having a connection whereby the other leaf will be lifted afterthe first mentioned leaf has traveled a certain distance.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the drawings Figure 1 is a transverse section. Fig. 2 is alongitudinal section taken on the line 22 of Fig. 1. Fig. 3 is a sectiontaken on the line 3-8 of. Fig. 1. Fig. 4 is a detailed view of a portionof the leaves when the same are in locked relation of which thefolflanges ples I mg the inner and the by-pass is closed. Fig. 5 isasection on the line 55 of Fig. 1, the leaves being shifted slightly fromthe positions shown in Fig. 1. Fig. 6 is a sectional detail showing thecooperation between the latch and the movable leaves.

shown a casing 10 comprising a section 22 having a flange 25, and asection 24 having a flange 26, the 25 and 26' b'eing connected by bolts9, or in any other suitable manner. The

In the drawing, there is constituent sections 22 and 24'of the casing 10are laterally extended to form a recess 20. The sections 22 and 24 ofthe casing 10 are provided with oppositedisposed nip- 11 which may beconnected with a pipe line. The casing 10 is extended beyond the nipples11, as shown at 12. M0unted in the casing sections 22 and 24 at theinner ends of the nipples 11' are seats 17 The casing 10 may be providedwith a blow-out or drain cock 100, located at any desired point, for thepurpose of disposing of the slime which may settle in the casing 10. Apin 21 is terminally mounted in the casing section 22 and is located inthe recess 20.

The invention further includes a primary leaf 14 and a secondary leaf15, the leaves 14 and 15 being mounted to move in parallel relationwithin the casing 10, the leaves 14 and 15 being supported for pivotalmovement upon the pin 21 and for sliding movement longitudinally of thepin. The outer, remote faces of the leaves 14 and 15 are equipped withseats 16, adapt-ed to engage the seats 17 of the casing 10 when theleaves are separatedtransversely by mechanism to be describedhereinafter. leaf 14 there is an opening 44, there being an opening 45in the leaf 15. The adjacent faces of the leaves 14 and 15 are providedrespectively with cams 43 and 42. Projectfrom the inner face of the leaf15 is a lug 50, there being a lug 51 projecting from face of the leaf14. These lugs 50 and 51 lie in a common circumference,

the center of which is the pin 21. Project- In the the space between theleaves 14 and 15. The

Journaled for rotation in the casing 10' are shafts 40 carrying wormsinto the racks 18 of the leaves Each shaft 40 carries a worm wheel 38,the worm wheels 38 meshing into a worm 29 carried by a shaft 27, one end30 of which is journaled in the section 24 of the casing 10, the otherend 32 of the shaft 27 passing outwardly-through a gland 33 and beingterminally provided with a hand wheel 28.

In practical operation the leaves 14 and 15 are raised and lowered bymanipulating the shaft 27 through the medium of the hand wheel 28, theworm 29 on the shaft 27 19 meshing actuating the worm wheels 38 upon theshafts 40, the worms 19 on the shafts 40 en gaging the racks 18 of theleaves 14 and 15,

it being noted that the lower edge 14 of the leaf 14 extends beyond thelower edge 15 of the leaf 15, so. that the leaf 14 will be advancedslightly ahead of the leaf 15. Suppose that the leaves 14 and 15 arepositioned as shown in Fig. 1. The leaf 15 has ridden off its actuatingworm 19 so that it can be lifted no farther. The leaf 14 is still inmesh with its worm 19, and by rotating. the shaft 27 the leaf 14 islifted farther. hen the leaf 14 is lifted in the manner above indicated,the lug 51 on the leaf 14 will be spaced from the lug on the leaf 14.The openings 44 and 45 will be brought into alinement by the lifting ofthe leaf 14 above described. The leaves 14 and 15 are now in openposition. 7 Suppose that a reverse rotation is imparted to the shaft 27.Then, the worms 19 engaging the racks 18 of the leaves 14 and 15, theleaves will be lowered, the openings 44 and 45 being alined to afiord aby-pass, and the lug 51 on the leaf 14 being spaced atsome distance tothe rear of the lug 50 on the leaf 15. Ultimately, the end 41 of therack 18 of the leaf 14 will ride off the actuating worm 19, the leaf 14dropping'to the bottom of the casing 10, the spacing of the lugs 50 and51 permitting the leaf 14 to drop. By this operation the openings 45 and44 will be moved out of alinement, so that a by-pass through the leaveswill no longer exist. lVhen the leaf 14 drops to the bottom of thecasing 10, the lower end of the latch 46 will engage with the projection48 of the leaf 14, and hold the leaf 14 in depressed position, to closeone nipple 11. Continued rotation of the shaft 27 will cause the otherworm 19 to lower the leaf 15, until the same rests upon the bottom ofthe casing 10, the openings 44 and 45 being out of alinement, as

14 and 15.'

clearly shown in Fig. 4. When both of the eaves 14 and 15 rest upon thebottom of the casing 10, and are in the position shown in Fig.4, thecams 42 and 43 of the respective leaves will coact to slide the leavesin opposite directions upon the pin 21, the seats 16 of the leaves 14and 15 being thrust against the seats 17 of the casing 10. When the leaf15 drops to the bottom of the casing,

the pivoted catch 48 on the leaf 15 will swing, permitting the latch 46.

When it is desired to restore the leaves 14 and 15 to an open position,rotatory movement is imparted to the shaft 27 and therefrom, to bothshafts 40. One worm 19, meshing into the rack 18 of the leaf 15, willelevate the leaf 15 until the lug 50 on the leaf 15 engages the lug 51of the leaf 14. Before the lugs 50 and 51 come into contact, the pivotedcatch 48 on the leaf 15, being supported by the stop lug 48 will engagethe lateral finger 47 of the latch 46 and move the latch 46 out ofengagement with the lug 48 on the leaf 14, so that the cooperating lugs50 and 51 may elevate the leaves simultaneously.

When the leaf 14 has been lifted sufficiently in the manner hereinbeforedescribed, the rack 18 of the worm 19, whereupon both leaves will moveto the position shown in Fig. 1, from which positions the description ofthe operation the catch to pass beneath began.

lVhat is claimed is: 1. A valve comprising independently movable primaryand secondary leaves; interlocking elements for holding the primary leafagainst movement, one interlocking element being independent of theleaves, and the other interlocking element being carried by the primaryleaf; and means upon the secondary leaf for engaging one of theinterlocking elements to break the engagement between the interlockingelements.

2. A valve comprising 7 independently movable primary and secondaryleaves; a latch supported in the path of the primary leaf and adapted toto hold the primary leaf against movement; and means upon the secondaryleaf for engaging the latch to break the engagement between the latchand the primary leaf.

3. A valve comprising independently movable primary and secondary leaveshaving openings; operating means engaging both leaves to move the leavessimultaneously and to hold the openings in alinement during thesimultaneous movement of the leaves, the secondary leaf being actuableby the operating means, independently of the primary leaf, to disposethe openings out of alinement.

4. A. valve comprising independently movable primary andsecondary leaveshavleaf 14 will mesh into one 9 engage the primary leaf ing openings;operating means engaging both leaves to move both leaves simultaneouslyand to hold the openings in alinement during the simultaneous movementof the leaves, the primary leaf being automatically disengageable fromthe operating means, and the secondary leaf being actuable by theoperating means subsequent to the disengagement of the primary leaf fromthe operating means, to dispose the openings out of alinement; andinterengaging elements upon the leaves for restoring the engagementbetween the primary leaf and the operating means when the secondary leafis actuated.

5. A valve comprising independently -movable primary and secondaryleaves having openmgs; operating means engaging both leaves to move bothleaves simultaneously and to hold the openings in alinement during thesimultaneous movement of the leaves, the secondary leaf being actuableby the operating means independently of the primary leaf to dispose theopenings out of alinement; interlocking elements for holding the primaryleaf against movement, one interlocking element being independent of theleaves and the other interlocking element being carried by the primaryleaf; and means upon the secondary leaf for engaging one of theinterlocking elements to break the engagement between the interlockingelements.

6. A valve comprising independently movable primary and secondary leaveshaving openings; operatingv means engaging both leaves to move bothleaves simultaneously and to hold the openings in alinement Copies ofthis patent may be during the simultaneous movement of the leaves, theprimary leaf being automatically disengageable from the operating meansand the secondary leaf being actuable by the operating means subsequentto the disengagement of the primary leaf from the operating means, todispose the openings out of alinement; interlocking elements upon theleaves for restoring the engagement between the primary leaf and theoperating means when the secondary leaf is actuated; a latch supportedin the path of the primary leaf and adapted to engage the primary leafto hold the primary leaf against movement; and means upon the secondaryleaf for engaging the latch to break the engagement between the latchand the primary leaf.

7 A valve including a casing, pivoted segments therein and disposed totravel in parallel relation, means for moving one segment independentlyof the other, both of said segments being provided with cams whichcontact during said independent movement, a latch member supported bythe casing and disposed to hold one of said segments against movement,and means car ried by the other segment and arranged. to contact withsaid latch member to release the first mentioned segment.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

TILMAN WHITE.

Witnesses R. D. KNIOKERBOCKER, GEO. F. BLANKENBUEHLER.

obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

